21 And he shall utter his voice out of Zion, and he shall speak from Jerusalem, and his voice shall be heard among all people;

22 And it shall be a voice as the voice of many waters, and as the voice of a great thunder, which shall break down the mountains, and the valleys shall not be found.

23 He shall command the great deep, and it shall be driven back into the north countries, and the islands shall become one land;

24 And the land of Jerusalem and the land of Zion shall be turned back into their own place, and the earth shall be like as it was in the days before it was divided.

25 And the Lord, even the Savior, shall stand in the midst of his people, and shall reign over all flesh.

59 For the Lord shall be in their midst, and his glory shall be upon them, and he will be their king and their lawgiver.

Teachings Concerning Celestial Law

25 And also that of element shall melt with fervent heat; and all things shall become new, that my knowledge and glory may dwell upon all the earth.

96 For I, the Almighty, have laid my hands upon the nations, to scourge them for their wickedness.

97 And plagues shall go forth, and they shall not be taken from the earth until I have completed my work, which shall be cut short in righteousness--

98 Until all shall know me, who remain, even from the least unto the greatest, and shall be filled with the knowledge of the Lord, and shall see eye to eye,

107 And then shall the angels be crowned with the glory of his might, and the saints shall be filled with his glory, and receive their inheritance and be made equal with him.

29 For in mine own due time will I come upon the earth in judgment, and my people shall be redeemed and shall reign with me on earth.

92  And thus we saw the glory of the celestial, which excels in all things--where God, even the Father, reigns upon his throne forever and ever ...

95  And he makes them equal in power, and in might, and in dominion.

    All Things Shall Be Revealed
    During the Millennium

32 Yea, verily I say unto you, in that day when the Lord shall come, he shall reveal all things–

33 Things which have passed, and hidden things which no man knew, things of the earth, by which it was made, and the purpose and the end thereof–

34 Things most precious, things that are above, and things that are beneath, things that are in the earth, and upon the earth, and in heaven.

We have the fulness of the everlasting gospel, meaning that we have all that is needed to gain the fulness of salvation. We have every truth, doctrine, and principle, every rite, power, and ordinance–all that is needed–to gain exaltation in the highest heaven of the celestial world. But we do not know all things; there are doctrines in endless array of which we know next to nothing; indeed, there are more things in the darkness of the unknown than there are in the light of the known. We do not even know what the faithful knew in Enoch’s Zion, nor among the Nephites when they dwelt in righteousness for generations. We do not know what is on the sealed portion of the plates from which the Book of Mormon came. Ours is a day for drinking milk; the day when we, as a people at least, can partake of the meat of the word is in the future.

That future is millennial. In that day, “all things shall become new,” saith the Lord, “that my knowledge and glory may dwell upon all the earth.... Yea, verily I say unto you, in that day when the Lord shall come, he shall reveal all things–Things which have passed, and hidden things which no man knew, things of the earth, by which it was made, and the purpose and the end thereof–Things most precious, things that are above, and things that are beneath, things that are in the earth, and upon the earth, and in heaven.” (D&C 101:25, 32-34.) As we ponder these heaven-sent words, we are led to exclaim: Thanks be to him who is the Way, the Truth, and the Life, who knows all things and who seeks to pour out his revelations, and all the knowledge of eternity, upon all who will receive them. Ere long the dark veil of ignorance and unbelief that covers the earth and blinds the minds of men shall be pierced. Light and truth will fall from heaven as does rain from the clouds above.

The knowledge of God, the knowledge of those Gods whom it is life eternal to know, shall be in every heart. No longer will theologians suppose that God is a spirit essence that fills immensity while he dwells in the human heart. No longer will philosophers pontificate about some great first cause that inexplicably brought order into a chaotic universe. No longer will Babylonish churches place crucifixes in the hands, or the images of Diana of the Ephesians, as it were, and no longer will they worship the works of their own hands in the great cathedrals of Christendom. The knowledge of God, the truth about God, the fact that he is a Holy Man, will come by revelation into every human heart. The knowledge of God will cover the earth.

All things are to be revealed in the millennial day. The sealed part of the Book of Mormon will come forth; the brass plates will be translated; the writings of Adam and Enoch and Noah and Abraham and prophets without number will be revealed. We shall learn a thousand times more about the earthly ministry of the Lord Jesus than we now know. We shall learn great mysteries of the kingdom that were not even known to those of old who walked and talked with the Eternal One. We shall learn the details of the creation and the origin of man and what fools mortals are to follow the fads of the evolving evolutionary nonsense that litters the textbooks of academia. Nothing in or on or over the earth will be withheld from human ken, for eventually man, if he is to be as his Maker, must know all things.

Hear in this connection these words of Nephi: In that day, “the earth shall be full of the knowledge of the Lord as the waters cover the sea. Wherefore, the things of all nations shall be made known; yea, all things shall be made known unto the children of men. There is nothing which is secret save it shall be revealed; there is no work of darkness save it shall be made manifest in the light; and there is nothing which is sealed upon the earth save it shall be loosed. Wherefore, all things which have been revealed unto the children of men shall at that day be revealed.” (2 Ne. 30:15-18.) Surely man could not ask for more than this in the way of light and truth and knowledge, and yet expect to remain in the flesh as a mortal and be in process of working out his salvation. Surely this is the day in which the Lord shall fulfill the promise of holy writ that says: “God shall give unto you knowledge by his Holy Spirit, yea, by the unspeakable gift of the Holy Ghost, [knowledge] that has not been revealed since the world was until now; which our forefathers have awaited with anxious expectation to be revealed in the last times, which their minds were pointed to by the angels, as held in reserve for the fulness of their glory; a time to come in the which nothing shall be withheld, whether there be one God or many gods, they shall be manifest.” (D&C 121:26-28.) That this outpouring of divine goodness has already commenced is not open to question. That it will continue, in far greater measure, after our Lord comes again, who can doubt?  (The Millennial Messiah [1982], pp.675-677)

    The Day of the Second Comforter

    34 And they shall teach no more every man his neighbour, and every man his brother, saying, Know the Lord: for they shall all know me, from the least of them unto the greatest of them, saith the Lord: for I will forgive their iniquity, and I will remember their sin no more.

Complete realization of the blessings here promised [Jer. 31:34] is Millennial, and the knowledge of God spoken of shall be manifest by the receipt of the Second Comforter, as the Prophet then proceeds to state, and as we shall now consider. (Doctrinal New Testament Commentary, 3 vols. [1973], 3:338)

“This generation shall have my word through you” (D&C 5:10). Joseph Smith has given the word, and we echo the message, and a great part of the message is that every one of us–equally precious–has power to get in tune with the Holy Spirit and learn personally what the prophet receives. There is going to be a day–it is millennial, the ancient prophets (Jeremiah, for one) foretold it–“when no man need say to his neighbor, Know ye the Lord; for all shall know Him…from the least to the greatest” (History of the Church, 3:380).  The Prophet Joseph Smith said that this promise has reference to personal revelation, to a visitation of the Lord to an individual (see History of the Church, 3:381). [“This Generation Shall Have My Word through You,” Ensign, June 1980, p. 59]

Men will know God in the millennial day because they see him.  He will teach them face to face.  They will know the mysteries of his kingdom because they are caught up to the third heaven, as was Paul. They will receive the Second Comforter.  The millennial day is the day of the Second Comforter, and whereas but few have been blessed with this divine association in times past, great hosts will be so blessed in times to come.

What, then, will be the nature of worship during the Millennium?  It will be pure and perfect, and through it men will become inheritors of eternal life. And in this connection, be it known that it is the privilege of the saints today to separate themselves from the world and to receive millennial blessings in their lives. And any person who today abides the laws that will be kept during the Millennium will receive, here and now, the spirit and blessings of the Millennium in his life, even though he is surrounded by a world of sin and evil. And so we say, in the language of Joseph Smith as he finished the record of the vision of the three degrees of glory: “Great and marvelous are the works of the Lord, and the mysteries of his kingdom which he showed unto us, which surpass all understanding in glory, and in might, and in dominion; Which he commanded us we should not write while we were yet in the Spirit, and are not lawful for man to utter; Neither is man capable to make them known, for they are only to be seen and understood by the power of the Holy Spirit, which God bestows on those who love him, and purify themselves before him; To whom he grants this privilege of seeing and knowing for themselves; That through the power and manifestation of the Spirit, while in the flesh, they may be able to bear his presence in the world of glory. And to God and the Lamb be glory, and honor, and dominion forever and ever. Amen.” (D&C 76:114-119.) [The Millennial Messiah [1982], p.683]